The explanation of the rafters.

Interpretation of rafters, a tool for divination. Throw two mussels into the air and watch them throw the ball to break the responsibility. Later, it was also made of bamboo or wood, cut into clams and divided into two generations. "Zhuzi Language" Volume 7 1: "According to all the names, cooperation is hopeless. I don't know why Confucius said it was innocent divination, such as decision, so it was auspicious, so it was fierce. There are many reasons in the hustle and bustle. " See Song Cheng Dachang's Performing Fan Lubujiao. The word decomposition is the same as "cup", a vessel for holding wine, tea, etc. : Yuchang. Long plate. Chang Yun [Chang Zhi] is unhappy; Unhappy. Radical: wood; The interpretation of the cup is that the divination tool is made of two clam shells or bamboo pieces like clam shells, and it is thrown on the ground to see its pitch, so as to predict good or bad luck. For example, "holding a cup leads me to vote, and the cloud is the most auspicious." Radical: Wang.